panic: kernfs.Dentry.DecRef() called without holding a reference

goroutine 514919 [running]:
panic(0x10cb560, 0x14321a8)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc001859738 sp=0xc001859670 pc=0x437c65
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0004a4bd0, 0x1476ce0, 0xc009ab2000)
	pkg/sentry/fsimpl/kernfs/kernfs.go:283 +0xb2 fp=0xc001859760 sp=0xc001859738 pc=0x852d52
gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc0004a4bd0, 0x1476ce0, 0xc009ab2000)
	pkg/sentry/vfs/dentry.go:157 +0x48 fp=0xc001859788 sp=0xc001859760 pc=0x7424c8
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountDisconnected(0xc0001e72f8, 0x1476ce0, 0xc009ab2000, 0xc00065ea20, 0xc00288d400, 0x9, 0xc00288d300, 0x6, 0xc001859a08, 0xc0006413e0, ...)
	pkg/sentry/vfs/mount.go:206 +0x298 fp=0xc001859858 sp=0xc001859788 pc=0x7514f8
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MountAt(0xc0001e72f8, 0x1476ce0, 0xc009ab2000, 0xc00065ea20, 0xc00288d400, 0x9, 0xc001859a38, 0xc00288d300, 0x6, 0xc001859a08, ...)
	pkg/sentry/vfs/mount.go:273 +0xd4 fp=0xc0018598f8 sp=0xc001859858 pc=0x7519f4
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Mount(0xc009ab2000, 0x20000240, 0x20000280, 0x200002c0, 0x200002, 0x20000300, 0x0, 0x0, 0x0, 0x0, ...)
	pkg/sentry/syscalls/linux/vfs2/mount.go:112 +0x52f fp=0xc001859b00 sp=0xc0018598f8 pc=0xe3a54f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc009ab2000, 0xa5, 0x20000240, 0x20000280, 0x200002c0, 0x200002, 0x20000300, 0x0, 0xc000001fa0, 0x12d7840, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x13c fp=0xc001859c60 sp=0xc001859b00 pc=0x9d7cfc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc009ab2000, 0xa5, 0x20000240, 0x20000280, 0x200002c0, 0x200002, 0x20000300, 0x0, 0x20000300, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc001859ce8 sp=0xc001859c60 pc=0x9d8e86
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc009ab2000, 0xa5, 0x20000240, 0x20000280, 0x200002c0, 0x200002, 0x20000300, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:198 +0x98 fp=0xc001859d48 sp=0xc001859ce8 pc=0x9d8a78
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc009ab2000, 0x2, 0xc009ab2000)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc001859e18 sp=0xc001859d48 pc=0x9d841c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc009ab2000, 0x144a900, 0x0)
	pkg/sentry/kernel/task_run.go:282 +0xc8c fp=0xc001859f60 sp=0xc001859e18 pc=0x9cd0ac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc009ab2000, 0x56b1)
	pkg/sentry/kernel/task_run.go:97 +0x1af fp=0xc001859fd0 sp=0xc001859f60 pc=0x9cbd2f
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc001859fd8 sp=0xc001859fd0 pc=0x472861
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:327 +0xfe